1285025 has 18 divisors (see below), whose sum is σ = 1855350. Its totient is φ = 880320.

The previous prime is 1285021. The next prime is 1285049. The reversal of 1285025 is 5205821.

It can be written as a sum of positive squares in 3 ways, for example, as 283024 + 1002001 = 532^2 + 1001^2 .

It is not a de Polignac number, because 1285025 - 2² = 1285021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 701 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (103075).

2^1285025 is an apocalyptic number.

It is an amenable number.

1285025 is a deficient number, since it is larger than the sum of its proper divisors (570325).

1285025 is a wasteful number, since it uses less digits than its factorization.

1285025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1285025 is about 1133.5894318491. The cubic root of 1285025 is about 108.7186019367.

The spelling of 1285025 in words is "one million, two hundred eighty-five thousand, twenty-five".